墙凹台 壁阶

scarcement  detail>>

墙凹台

scarcement  detail>>

壁阶

scarcement scarf  detail>>

凹台面

mff  detail>>

墙凹口

wall pocket  detail>>

干船坞壁阶

dock-wall altar  detail>>

舭撑壁阶

bilge altar  detail>>

闸墙凹槽

wall recess  detail>>

墙凹口 预留梁洞

wallpocket  detail>>

闸墙凹槽内的系船柱

recessed bollard  detail>>